Richard wood davies



(No Model.) 2 SheetsSheet 1.

R. W. DAVIBS.

BRICK MACHINE.

No. 439,322. Patented Oct. 28, 1890.

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2 Sheets-Sheet 2. R. W. DAVIES.

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Patented Oo't. 28, 1890.

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` UNITED i STATES PATENT CEEicE.

RICHARD IVOOD DAVIES, OF CROYDON, NEAR SYDNEY, NEW SOUTH VALES.

BRICK-MACHINE.

SPECIFICATION forming part of Letters Patent No. 439,322, dated October 28, 1890. Application filed July 18, 1889. I Serial No. 317,954. 7 (No model.) Patented in New South Wales September 13, 1888, No. 935.

T0 all whom it may concern.-

Be it known that I, RICHARD WOOD DAvIEs, a subject of the Queen of Great Britain, residing at Croydon, near Sydney, New South Wales, have invented certain new and useful Improvements in Brick-Machines, (for which I have received a patent in New South Wales, dated September 13, 1888, No. 935;) and I do hereby declare the following to be a full,'clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.

The invention relates to brick-machines in which power is applied by mechanical means such as cams, eccentrics, and the like-actuated by any suitable motor; and it has for its object to provide means whereby the bricks may be more uniformly compacted or consolidated, whereby the danger of breakage or damage to 'the operative devices is `greatly lessened.

In the accompanying drawings, Figure l is a front elevation of a brick-machine embodying my invention. Fig. 2 is a side elevation, and Fig. 3 is a top plan view. Fig. 4 is avertical section taken on or about on line :c of Fig. 2, and Fig. 5 is a like view taken on or about online y y of Fig. 4.

In the above-described figures of drawings like letters indicate like .parts wherever such may occur.

A indicates the base or sole plate of the machine, upon which the entire structure is mounted, and from which rise two uprights or cheeks A' A', in which are form ed the bearings for the upper and lower cam or eccentric shafts C and D, respectively, the said standards or cheeks being provided with .vertical slots A5, in which move the journals of the upper piston or cross-head E, to which is bolted the upper piston E. The said cross-head E has formed therein on aline with the moldboxes B an openingfor the reception of a frog-mold E2, the shank of which carries an anti-friction roller E3, that is acted upon bya cam C' on the upper cam-shaft C. The said shaft C also carries two cams C2 C2-one on each side of cam C'-that operate upon antifriction rollers E4, mounted on the upper A cross-head E. The cams C2 C2 are of less diameter than the cam C', so that the latter cam 55 will depress the frog-mold E2 in advance of the cross-head E', the prongs of said mold eX- tending into or working in slots formed in the upper piston E', Whose upper face constitutes the bottom of the opening in the cross-head 6o E and serves to limit the downward movement of the frog-mold, the contracted upper portion of said opening, in which works the shank of said frog-mold, forming abutments that limit the upward motion of said mold.

The upper cross-head E is provided at opposite ends with a journal D6, that projects through the slots A5 in the cheeks A', and to said journals is secured one end of a rod D5, the opposite end of which is forked and has a roller D7 7o mounted in said fork, which roller rides upon a cam D4, mounted on the lower shaft D. The vertically-reciprocating rods D5 are guided in brackets Af', projecting fromv the cheeks A'.

The lower shaft D carries a cam or eccentric DS, that operates upon an anti-friction roller F3, mounted in bearings F2 on the under side of the lower piston or cross-head F. The said shaft D also carries two eccentrics D9 D9one on each side of eccentric DS-the straps or 8o lrods Fil of which operate in slippers F5 on the lower cross-head F, which is provided with two pistons Fone for each mold-box B, of which I have shown two-the upper piston being provided with a transverse notch or recess tting over the partition B2 between the two mold-boxes. (See Fig. 4.)

For the purpose of determining the thickness of the brick to be made, I provide means for adjusting the limit of downward mo- 9o tion of the lower pistons F', which means consist of wedge-pieces H, that rest upon a suit'- able supporting-box H10, the upper face of which is inclined, as shown in Fig. 4. The

wedge-pieces are adapted for adjustment under the lower cross-head F by means of a lever H', pivoted at H2 to the outer end of the wedge-pieces H and fulcrumed at H3 to a bracket H4, depending from the delivery-table A2, and said lever is provided with a han- Ioo In order to automatically feed the material to the mold-boxes, I provide a feed-box G, that has an extension-board G', fitting closely under the feed-hopper A4, that is secured to the feed-table A2 of the machine. The feedboX G is connected by a link or connectingrod G2 to a radial arm or lever G3 on the power-transmitting shaft G4, that is adapted to revolve in bearings G5 and carries a pinion J2 in gear with a wheel D10 on the lower shaft D, the said wheel D10 being in gear with a wheel C2 on the upper shaft C.

An intermittently-reciprocating movement is imparted to the feed-box G through the medium of the radial arm or lever G51 on the shaft G4, said levei1 carrying at one end an anti-friction roller G6 in the path of cam-ribs or risers D2 Ds on a cam-disk D', secured to the lower shaft D, the free end of the lever being maintained in a proper position relatively to the cam-ribs by a spring G10. (See Fig. 2.)

The operation of the machine is as follows: Motion being imparted to the driving-shaft I, which carries the fast and loose belt-pulleys I 121, said motion is transmitted through pinion I2 on shaft I to pinion J on shaft G4, and through pinion J2 on said shaft to the gear-'wheel D10, and through the latter to the gear-wheel C2, thereby revolving the upper and lower shafts C and D, respectively, while the lever vG21 imparts motion to the feed-box G, which, being filled with clay, is caused to move forward over the mold-boxes, the clay being discharged into the same,`while the eX- tension-board G will prevent the cl'ay in hopper A4 from falling out at the lower end, said extension-board performing the function of a valve. As soon as the clay in the feed-box is dumped into the mold-boxes B the said feed-box is returned to its normal position by the action of the levers G5 G01, the roller of which lever G51 travels then between the camribs yor risers D2 D3. While the feed-box Gis being refilled under hopper A4 the center cam C', which, as hereinabove stated, is rof greater diameter than the cams G2 C2, first impinges upon roller E2, thereby depressing the frog-mold E2 in advance of the cross-head E and upper piston E', the said frog-mold E2 having free vertical motion within certain limits in said cross-head and piston. The outer cams C2 now operate upon the rollers E4 and depress the cross-head and top piston with the frog-mold, which iirst makes a comparatively deep impression in the clay in the mold-boxes B, after which the piston E enters the mold-boxes. Simultaneously with these movements of the upper piston and frog-mold the eccentrics D0, through their rods F4 and the slippers F5, cause the lower crosshead F to'move upwardly, the pistons F rising within the mold-boxes, thus compressing the clay therein.

By the operations described a more uniformly-compacted brick is obtained than would be the case otherwise, the brick being perfect and true in form and having sharp edges and angles. It will of course be understood that before the upper piston E has reached the limit of its downward motion the frog-mold will have reached the limit of its motion in the same direction, so that when said upper piston, in conjunction with the lower pistons, applies the final pressure to the clay in the mold-boxes the cam C will have moved out of contact with the rollerESon the frog-mold, which will remain stationary while the upper piston is still moving downward, so that when said piston reaches the limit of its downward movement the lower extremity of the prongs of the frog-mold will be substantially flush with the lower face of the vpiston E so as to leave the upper face of the brick smooth. The'objec't of the primary partial compression of the clay in the molds by the frog-mold E2 is to drive out the major portion of the air contained in the clay, whereby the final compression is not only facilitated, but a denser and more homogeneous brick is obtained.

During the compression of the clay the center eccentric D0 will keep the pistons F rmly in their mold-boxes B, and as soon as the top pressure is relieved through the cams D4 acting upon the rollers D7 at the lower end of the pendent arms D5, secured to the upper cross-head E, the said pistons F will -move upward, also, to the level of the mold-boxes B. As the pistons F reach the limit of their upward movement, the filled feed-box G makes its traversing motion and pushes the finished bricks onto the delivery-table A0, the clay in said box falling into the mold-boxes, when the described operations will be repeated.

Having described my invention, what I claim is.- Y

l. In a brickmachine, the combination, with the piston-head E, the piston E ,secured thereto, and the frog-mold E2, adapted to have independent motion within said pistonhead and piston, of the mold-box B, divided into two compartments by va partition B2 of the cam-shaft C, and the cams C and C2 C2, said cam C being of greater diameter than the cams C2, substantially as and for the purposes set forth.

2. In a brick-machine, the combination of the shaft D, the cams or eccentrics D4, and the gear-wheel D10 on said shaft with the camshaft C, the gear-wheel C5 thereon, and the cross-head E, having pendent arms havi-ng bearing on the eccentrics D4, substantially as and for the purposes set forth.

RICHARD WOOD DAVIES.

Witnesses:

FRED WALSH,

F. lll. Inst., P. A.

THos. J. WARD,

Clerk to Edwd. W caters, Sydney.

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